Allen e



(Model.)

A. R. SEAMAN.

STUPFING BOX JACK.

Np. 298,903. Patented May 20, 1884.

N. FUERS, Fhomumugnpmr. wmhlngzm llc.

ALLEN R. SEAMAN, OF ASTORIA7 NEW YORK.

STUFFING-BOX JACK.

SPECIFICATION forming part of Letters Patent No. 298,903, dated May 20,1884. Application filed June 15,1883. (Model.)

To all whom it may concern.-

Be it known that I, ALLEN R. Salman, of Astoria, in the county of Queensand State of New York, have invented a new and useful Improvement inJacks for Stuffing Boxes, Src., of which the following is aspecification.

This jack is made of two forks, each of which has wedge-shaped surfaces.One is moved upon the other by the action of a screw. The two outersurfaces are parallel. When this jack is inserted between the hand-wheeland the packing-gland in a globe valve or cock, the screw-cap of thegland can be forced down to press the packing into its place and to holdthe cap squarely in position while being rotated to cause it to enterand screw into the packing-gland.

This jack can be used for forcing a wheel off its shaft or performingsimilar operations,A

where the distance between two parallel surfaces requires to beincreased.

In the drawings, Figure l shows the jack applied to the cap of avalve-stem. Fig. 2 shows a top view of the j ack minus the handle. Fig.8 shows a vertical plan of the jack partly expanded. Fig. 4L is avertical section taken through Y Z of Fig. 3, also showing the slot inwhich the screw works; and Fig. 5 shows a longitudinal section takenthrough E F of Fig. 2.

A representsV the upper movable incline block of the jack, and` D thelower or stationary incline block. B represents the wheelhandle of thevalve; C, the cap or gland of the valve-stem. The inclineplane blocks AD are both made Ushaped, the yoke portion a being made with the movableblock A, and the yoke portion I) being made with the stationary block:D. The screw-stem S passes through the yoke b, which is out internallywith acorresponding thread, and Iprovide a suitable handle, T, by meansof which the screw-stein is revolved. The yoke portion ce is slotted,and the end of thescrew-stem is reduced to pass through said slot, and Iprovide washers upon the stem S at each side of yoke portion ce, and Isecure the movable block A and stem S together by a pin through the stemat c. There are also lips upon the movable incline ce, that entergrooves in the sides of the stationary incline D, thus steadying andsecuring the parts.

In Fig. l the stationary block bears against the gland and the movableincline block against the handle, and the revolution of the screw-stem Sin one direction causes the inclined movable block A to slide up theinclines upon D, and causes pressure to be brought to bear upon theobject to be compressed or removed by the jack. The revolution of stem Sin the other direction returns the parts to. their normal position.

My improved jack is applicable for use in various ways, and I do notwish to be understood as limiting it to stufling-boxes.

I claim as my invention- The combination, in a stuffing-box jack, of twoblocks or forks, A D, having inclined or wedge -shaped surfaces wherethe one rests upon the other, lip-pieces, and grooves to connect the onefork or block with the other, and a screw passing through the head pieceor yoke of one of the forks and acting upon the head piece or yoke ofthe other fork, substantially as set forth.

ALLEN R. SEAMAN.

Witnesses:

ABM. VAN SANfrvoonn, H. Q. LANsING.

